Apparatus for decelerating elevator at terminating floor

Abstract

An apparatus for decelerating an elevator at a terminating floor having a plurality of terminating detectors successively provided in the vicinity of the terminating floor for generating a terminating deceleration command value gradually decreasing upon operation of the detectors when the cage of the elevator approaches the terminating floor which comprises; a pulse generator for generating pulses corresponding to the moved distance of the cage; memories for storing the distances from the terminating floor to said respective terminating detectors; a counter for setting the distance information of the detectors of said memories upon operation of the detectors and counting the output pulses of said pulse generator, thereby subtracting the pulses from the set value; and a distance-to-speed converter for calculating the terminating deceleration command value corresponding to the output of said counter.

What is claimed is: 
     
       1. An apparatus for decelerating an elevator at a terminating floor having a plurality of terminating detectors successively provided in the vicinity of the terminating floor for generating a terminating deceleration command value gradually decreasing upon operation of the detectors when the cage of the elevator approaches the terminating floor which comprises: a pulse generator which generates pulses corresponding in number to a moved distance of the cage;   memories which store distances from the terminating floor to respective terminating detectors;   a counter in which the distance information of one of the memories is preset in correspondence with the operation of one of said plurality of terminating detectors when the cage starts an ascending or descending operation, and thereafter the distance information of the memory corresponding to another of said terminating detectors is set when said another terminating detector operates, and which is supplied with said pulses when said one terminating detector detects the presence of the cage, to count said pulses and to subtract the count value from the set value; and   a distance-to-speed converter which calculates the terminating deceleration command value corresponding to the output of said counter.   
     
     
       2. An apparatus for decelerating an elevator at a terminating floor as set forth in claim 1, wherein: the pulses continue to be supplied to said counter from a time at which one of said plurality of terminating detectors firstly operated after the start of the operation detects the presence of the cage until a time at which another of said terminating detectors lastly operated detects the presence of the cage.   
     
     
       3. An apparatus for decelerating an elevator at a terminating floor as set forth in claim 2, wherein: said counter is preset by an element which produces an output signal for a predetermined time upon the start of the ascending and descending operation of the cage.   
     
     
       4. An apparatus for decelerating an elevator at a terminating floor as set forth in claim 1, wherein: the terminating detectors are installed in the vicinities of both the top floor and the bottom floor, and said memories, said counter and said distance-to-speed converter are started operating by any of said terminating detectors.   
     
     
       5. An apparatus for decelerating an elevator at a terminating floor as set forth in claim 4, wherein: a relation of the distances to the top floor of the respective terminating detectors provided in the vicinity of the top floor is equal to that of the distances to the bottom floor of the respective terminating detectors provided in the vicinity of the bottom floor.   
     
     
       6. An apparatus for decelerating an elevator at a terminating floor as set forth in claim 1, wherein: in accordance with a signal produced upon operation by the cage of a terminating detector, the distance information corresponding to said terminating detector which is a production source of said signal is set in said counter from the memory storing said distance information.   
     
     
       7. An apparatus for decelerating an elevator at a terminating floor as set forth in claim 1, wherein: said distance-to-speed converter is a memory device which stores a speed command value corresponding to the distance and sequentially outputs speed command values corresponding to the distance signals from said counter.   
     
     
       8. An apparatus for decelerating an elevator at a terminating floor as set forth in claim 1, wherein: the distance information corresponding to each of said terminating detectors is set in said counter by an element which produces an output signal for a predetermined time in response to the operation of said each terminating detector.   
     
     
       9. An apparatus for decelerating an elevator at a terminating floor as set forth in claim 1, wherein: the operations of said memories, said counter and said distance-to-speed converter are performed by a computer.